Title :
Experimental validation of the ´improved directivity element´-elevation plane control
Author :
Corum, Kenneth L. ; Corum, J.F.
Author_Institution :
Corum & Associates Inc., Windsor, OH, USA
Abstract :
The authors present experimental verification of an improved directivity element (the Corum element) for controlling the elevation plane directivity of a vertical monopole element. The results suggest that, if an image plane version of the Corum element is used to surround an existing tower, the resulting antenna will improve the sky-wave suppression in all cases, with a modest increase in ground wave. While performing an antifade engineering study for a broadcast antenna at 530 kHz, the authors decided to run a study on a typical 1 kW GWEN (ground-wave emergency network) station (300 ft tower in the 160-190 kHz band). It was found that the Corum element makes a significant improvement in useful GWEN coverage.<>
Keywords :
broadcast antennas; directive antennas; fading; 1 kW; 160 to 190 kHz; 530 kHz; Corum element; GWEN; antifade engineering study; broadcast antenna; elevation plane directivity control; ground-wave emergency network station; improved directivity element; sky-wave suppression; vertical monopole element; Antenna measurements; Broadcasting; Current distribution; Electric variables measurement; Magnetic field measurement; Magnetosphere; Poles and towers; Solids; Toroidal magnetic fields; Wavelength measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.134785
